Authentic Oracle 1Z0-819 Exam Dumps PDF - 2023 Updated [Q100-Q122]

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Authentic Oracle 1Z0-819 Exam Dumps PDF – 2023 Updated

Get Prepared for Your 1Z0-819 Exam With Actual 262 Questions

The Oracle 1z1-819 certification exam is designed for Java developers who want to validate their expertise in Java SE 11 development. This exam tests the candidate’s ability to develop Java applications using the latest features and enhancements of Java SE 11. It covers a wide range of topics including Java fundamentals, object-oriented programming, concurrency, and I/O streams. The exam is intended for developers who have at least 1-2 years of experience in Java development and want to demonstrate their mastery of the language.

The Oracle 1z1-819 (Java SE 11 Developer) Certification Exam is a valuable certification for Java developers. The certification demonstrates that the developer has a deep understanding of Java SE 11 development and can create efficient and effective Java applications. The certification is recognized by employers worldwide and is a great way to enhance your career prospects.

The Oracle 1Z0-819 exam is an excellent way for Java developers to validate their skills and knowledge and enhance their career prospects. By passing this exam, developers can demonstrate their proficiency in Java SE 11 and gain recognition as an Oracle Certified Professional (OCP) Java SE 11 Developer.

QUESTION 100
Given the code fragment:
Path currentFile = Paths.get(“/scratch/exam/temp.txt”);
Path outputFile = Paths get(“/scratch/exam/new.txt”);
Path directory = Paths.get(“/scratch/”);
Files.copy(currentFile, outputFile);
Files.copy(outputFile, directory);
Files.delete (outputFile);
The /scratch/exam/temp.txt file exists. The /scratch/exam/new.txt and /scratch/new.txt files do not exist.
What is the result?

/scratch/exam/new.txt and /scratch/new.txt are deleted.

The program throws a FileaAlreadyExistsException.

The program throws a NoSuchFileException.

A copy of /scratch/exam/new.txt exists in the /scratch directory and /scratch/exam/new.txt is deleted.

QUESTION 101
Which two modules include APIs in the Java SE Specification? (Choose two.)

java.logging

java.desktop

javafx

jdk.httpserver

jdk.jartool

QUESTION 102
Given an application with a main module that has this module-info.java file:

Which two are true? (Choose two.)

A module providing an implementation of country.CountryDetails can be compiled and added without recompiling the main module.

A module providing an implementation of country.CountryDetails must have a requires main; directive in its module-info.java file.

An implementation of country.countryDetails can be added to the main module.

To compile without an error, the application must have at least one module in the module source path that provides an implementation of country.CountryDetails.

To run without an error, the application must have at least one module in the module path that provides an implementation of country.CountryDetails.

Reference:
/java-9-error-not-in-a-module-on-the-module-source- path

QUESTION 103
Which code fragment prints 100 random numbers?

Option A

Option B

Option C

Option D

QUESTION 104
Given:

What is the result?

A java.util.NoSuchElementException is thrown at run time.

Ans : a

The compilation fails.

Ans :

QUESTION 105
Which two are functional interfaces? (Choose two.)

Option A

Option B

Option C

Option D

Option E

QUESTION 106
Given the code fragment:

What is the result?

-1 : 2

2 : -1

2 : 3

3 : 0

QUESTION 107
Given:

executed using command:
java Hello “Hello World” Hello World
What is the output?

An exception is thrown at runtime.

Hello WorldHello World

Hello World Hello World

Hello WorldHelloWorld

HelloHello WorldHelloWorld

QUESTION 108
Given:

What must be added in line 1 to compile this class?

catch(IOException e) { }

catch(FileNotFoundException | IndexOutOfBoundsException e) { }

catch(FileNotFoundException | IOException e) { }

catch(IndexOutOfBoundsException e) { }catch(FileNotFoundException e) { }

catch(FileNotFoundException e) { }catch(IndexOutOfBoundsException e) { }

QUESTION 109
Given:

and

Which two method definitions at line n1 in the Bar class compile? (Choose two.)

public List<Number> foo(Set<String> m) {…}

public List<Integer> foo(Set<CharSequence> m) {…}

public List<Integer> foo(TreeSet<String> m) {…}

public List<Object> foo(Set<CharSequence> m) {…}

public ArrayList<Integer> foo(Set<String> m) {…}

public ArrayList<Number> foo(Set<CharSequence> m) {…}

QUESTION 110
Given the code fragment:

What is the result?

The compilation fails at line

The compilation fails at line 16.

The compilation fails at line 13.

QUESTION 111
Given:
LocalDate d1 = LocalDate.of(1997,2,7);
DateTimeFormatter dtf =
DateTimeFormatter.ofPattern( /*insert code here*/ );
System.out.println(dtf.format (d1));
Which pattern formats the date as Friday 7th of February 1997?

“eeee dd+”th of”+ MMM yyyy”

“eeee dd’th of’ MMM yyyy”

“eeee d+”th of”+ MMMM yyyy”

“eeee d’th of’ MMMM yyyy”

QUESTION 112
Which code is correct?

Runnable r = “Message” > System.out.println();

Runnable r = () > System.out::print;

Runnable r = () -> {System.out.println(“Message”);};

Runnable r = > System.out.println(“Message”);

Runnable r = {System.out.println(“Message”)};

QUESTION 113
Given:

What code inserted into class C would allow it to compile?

public void x() { }
public void z() { }

public void x() { }
protected void y() { super.y(); }
public void z() { }

void x() { }
public void y() { }
public void z() { }

void x() { super.y(); }
public void z() { }

void x() { }
public void z() { }

QUESTION 114
Which method throws an exception for not-a-number and infinite input values?

QUESTION 115
Given:
Which statement on line 1 enables this code to compile?

Consumer function = (String f) -> (System.out.println(f);};

Supplier function = () -> fruits.get (0);

Predicate function = a -> a.equals(“banana”);

Function function = x -> x.substring(0,2);

QUESTION 116
Given this enum declaration:

Examine this code:
System.out.println(Letter.values()[1]);
What code should be written at line 5 for this code to print 200?

public String toString() { return String.valueOf(ALPHA.v); }

public String toString() { return String.valueOf(Letter.values()[1]); }

public String toString() { return String.valueOf(v); }

String toString() { return “200”; }

QUESTION 117
Given:
List<String> list1 = new ArrayList<>();
list1.add(“A”);
list1.add(“B”);
List list2 = List.copyOf(list1);
list2.add(“C”);
List<List<String>> list3 = List.of(list1, list2);
System.out.println(list3);
What is the result?

[[A, B],[A, B]]

An exception is thrown at run time.

[[A, B], [A, B, C]]

[[A, B, C], [A, B, C]]

QUESTION 118
Given:

What is the result?

is it 1

An IndexOutOfBoundsException is thrown at runtime.

is it 0

this is it 2

this is it 3

QUESTION 119
Given:

What is the result?

5 4 3 2 1

nothing

5 4 3 2 1 4 3 2 1 3 2 1 2 1 1

Explanation
Graphical user interface, application Description automatically generated

QUESTION 120
var numbers = List.of(0,1,2,3,4,5,6,7,8,9);
You want to calculate the average of numbers. Which two codes will accomplish this? (Choose two.)

double avg = numbers.stream().parallel().averagingDouble(a > a);

double avg = numbers.parallelStream().mapToInt (m > m).average().getAsDouble ();

double avg = numbers.stream().mapToInt (i > i).average().parallel();

double avg = numbers.stream().average().getAsDouble();

double avg = numbers.stream().collect(Collectors.averagingDouble(n > n));